(Britain) A vehicle equipped with electronic instrumentation that can detect the oscillator of a domestic television, used by the licensing authority to check that a household with no TV licence does not have a television receiver

plural of smoke detector

A device that detects heat and sounds an alarm.

plural of heat detector

plural of metal detector

plural of detector van

plural of sarcasm detector

plural of window detector

(railways) A bar, connected with a switch, longer than the distance between any two consecutive wheels of a train, laid inside a rail and operated by the wheels so that the switch cannot be thrown until the entire train has passed the switch.

plural of detector bar